The CLANG_VERSION for svn clang versions have a svn suffix "8.0.0svn" and all the libraries have a svn suffix.
But not the in builtin include dir. It still points to
without the suffix.
Extend the PATH_SUFFIXES to also looks a version without svn suffix.
- install clang-svn
- execute cmake .. (for kdevelop)
-> it will fail
Reviewers: #kdevelop, kfunk
Reviewed By: #kdevelop, kfunk
Differential Revision: https://phabricator.kde.org/D15998